Contact wafer



FIG. 1 is a top, front, and right side perspective view of a contact wafer showing our new design;

FIG. 2 is a bottom, back, and left side perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof

FIG. 5 is a left view thereof;

FIG. 6 is a right view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The dot-dash broken lines represent the bounds of the claimed design while all other evenly spaced broken lines are directed to environment and are for illustrative purposes only; the broken lines form no part of the claimed design. 

CLAIM The ornamental design for a contact wafer, as shown and described. 